/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.core.util;
  
  import java.util.Calendar;
  import java.util.Date;
  import java.util.TimeZone;
  
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  
  public class TimeUtilTest {
  
      @Test
      public void testSecond() {
          // Mon Nov 20 18:05:17,522 CET 2006
          long now = 1164042317522L;
          // Mon Nov 20 18:05:18,000 CET 2006
          long expected = 1164042318000L;
          long computed = TimeUtil.computeStartOfNextSecond(now);
          Assertions.assertEquals(expected - now, 478);
          Assertions.assertEquals(expected, computed);
      }
  
      @Test
      public void testMinute() {
          // Mon Nov 20 18:05:17,522 CET 2006
          long now = 1164042317522L;
          // Mon Nov 20 18:06:00 CET 2006
          long expected = 1164042360000L;
  
          long computed = TimeUtil.computeStartOfNextMinute(now);
          Assertions.assertEquals(expected - now, 1000 * 42 + 478);
          Assertions.assertEquals(expected, computed);
      }
  
      @Test
      public void testHour() {
          // Mon Nov 20 18:05:17,522 GMT 2006
          long now = 1164045917522L;
          now = correctBasedOnTimeZone(now);
          // Mon Nov 20 19:00:00 GMT 2006
          long expected = 1164049200000L;
          expected = correctBasedOnTimeZone(expected);
  
          long computed = TimeUtil.computeStartOfNextHour(now);
          Assertions.assertEquals(expected - now, 1000 * (42 + 60 * 54) + 478);
          Assertions.assertEquals(expected, computed);
      }
  
      @Test
      public void testDay() {
          // Mon Nov 20 18:05:17 GMT 2006
          long now = 1164045917522L;
          now = correctBasedOnTimeZone(now);
          // Tue Nov 21 00:00:00 GMT 2006
          long expected = 1164067200000L;
          expected = correctBasedOnTimeZone(expected);
          long computed = TimeUtil.computeStartOfNextDay(now);
  
          Assertions.assertEquals(expected - now, 1000 * (3600 * 5 + 60 * 54 + 42) + 478);
          Assertions.assertEquals(expected, computed);
      }
  
      @Test
      public void testWeek() {
          // Mon Nov 20 18:05:17 GMT 2006
          long now = 1164045917522L;
          now = correctBasedOnTimeZone(now);
          // Sun Nov 26 00:00:00 GMT 2006
          long expected = 1164499200000L;
          expected = correctBasedOnTimeZone(expected);
  
          Calendar cal = Calendar.getInstance();
          cal.setTime(new Date(now));
  
          int dayOffset = cal.getFirstDayOfWeek() - Calendar.SUNDAY;
          if (dayOffset != 0) {
              expected += 24L * 3600 * 1000 * (cal.getFirstDayOfWeek() - Calendar.SUNDAY);
          }
  
          long computed = TimeUtil.computeStartOfNextWeek(now);
          // System.out.println("now "+new Date(now));
          // System.out.println("computed "+new Date(computed));
          // System.out.println("expected "+new Date(expected));
          Assertions.assertEquals(expected - now, 1000 * (3600 * (5 + 24 * (5 + dayOffset)) + 60 * 54 + 42) + 478);
          Assertions.assertEquals(expected, computed);
      }
 
     @Test
     public void testMonth() {
         // Mon Nov 20 18:05:17 GMT 2006
         long now = 1164045917522L;
         now = correctBasedOnTimeZone(now);
         // Fri Dec 01 00:00:00 GMT 2006
         long expected = 1164931200000L;
         expected = correctBasedOnTimeZone(expected);
 
         long computed = TimeUtil.computeStartOfNextMonth(now);
         Assertions.assertEquals(expected - now, 1000 * (3600 * (5 + 24 * 10) + 60 * 54 + 42) + 478);
         Assertions.assertEquals(expected, computed);
     }
 
     private long correctBasedOnTimeZone(long gmtLong) {
         int offset = TimeZone.getDefault().getRawOffset();
         return gmtLong - offset;
     }
 
 }